365  
FNCA52 TJSJ 160748  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
348 AM AST WED JAN 16 2019  
   
DISCUSSION
 
KDBI VALUES AND TEN-HOUR FUEL MOISTURE ACROSS THE  
SOUTHERN COASTAL PLAINS OF PUERTO RICO CONTINUE TO REMAIN ABOVE  
600 AND 10% RESPECTIVELY, SUGGESTING THAT THE VEGETATION REMAINS  
VERY DRY. THE MAIN LIMITING FACTORS, HOWEVER, FOR FIRE SPREADING  
WILL BE THE LIGHT WINDS OF LESS THAN 15 MPH AND AN INCREASE IN  
CLOUDINESS, WHICH WILL PREVENT RELATIVE HUMIDITY VALUES FROM  
DROPPING TO THE CRITICAL THRESHOLD LEVELS FOR A PROLONGED PERIOD  
OF TIME. THEREFORE, THE FIRE DANGER IS DEEMED TO BE LOW TO  
MODERATE FOR TODAY.  
 
PRZ014-170800-  
SOUTHEAST COASTAL PLAINS-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 30 20 10  
TEMP (24H TREND) 85 (-1) 62 (-2) 85  
RH % (24H TREND) 51 (+6) 100 (+1) 49  
20FTWND-VAL/AM(MPH) E 7 E 6  
20FTWND-RDG/PM(MPH) SE 9 NE 7 SE 9  
MIXING HGT(FT-AGL/MSL)6088 6742  
TRANSPORT WND (MPH) E 9 SE 7  
VENT RATE (KT-FT) 52406 38385  
DISPERSION 5 5  
DSI 5 3 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-170800-  
SOUTHERN HILLS-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 20 20  
TEMP (24H TREND) 83 (+2) 62 (-1) 83  
RH % (24H TREND) 53 (+5) 100 (+3) 49  
20FTWND-VAL/AM(MPH) E 7 E 6  
20FTWND-RDG/PM(MPH) SE 8 NE 5 SE 7  
MIXING HGT(FT-AGL/MSL)6306 6718  
TRANSPORT WND (MPH) E 8 SE 6  
VENT RATE (KT-FT) 47545 38181  
DISPERSION 5 5  
DSI 5 2 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-170800-  
NORTH COASTAL PLAINS-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 50 20 30  
TEMP (24H TREND) 84 (-1) 66 (-2) 84  
RH % (24H TREND) 55 (+5) 100 (+11) 51  
20FTWND-VAL/AM(MPH) SE 6 SE 5  
20FTWND-RDG/PM(MPH) E 9 SE 7 E 7  
MIXING HGT(FT-AGL/MSL)5463 6172  
TRANSPORT WND (MPH) E 8 E 3  
VENT RATE (KT-FT) 42993 31317  
DISPERSION 5 5  
DSI 6 4 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ017-170800-  
NORTHERN HILLS-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 20 50  
TEMP (24H TREND) 82 (-2) 62 (-1) 82  
RH % (24H TREND) 55 (+11) 100 (+5) 52  
20FTWND-VAL/AM(MPH) SE 5 LGT/VAR  
20FTWND-RDG/PM(MPH) NE 6 SE 5 LGT/VAR  
MIXING HGT(FT-AGL/MSL)6572 6615  
TRANSPORT WND (MPH) E 7 NE 1  
VENT RATE (KT-FT) 40912 19240  
DISPERSION 5 5  
DSI 5 3 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-170800-  
WEST COAST-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 30 20 30  
TEMP (24H TREND) 84 (+1) 65 (-1) 84  
RH % (24H TREND) 48 (+2) 100 (+10) 47  
20FTWND-VAL/AM(MPH) E 6 E 5  
20FTWND-RDG/PM(MPH) N 6 E 6 NE 5  
MIXING HGT(FT-AGL/MSL)6456 6420  
TRANSPORT WND (MPH) E 5 E 2  
VENT RATE (KT-FT) 40294 24238  
DISPERSION 5 5  
DSI 6 4 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ019-170800-  
EASTERN INTERIOR-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 50 20 20  
TEMP (24H TREND) 84 (0) 62 (-3) 84  
RH % (24H TREND) 58 (+11) 100 (+4) 55  
20FTWND-VAL/AM(MPH) SE 5 SE 5  
20FTWND-RDG/PM(MPH) E 8 E 5 SE 7  
MIXING HGT(FT-AGL/MSL)5203 6501  
TRANSPORT WND (MPH) E 9 SE 7  
VENT RATE (KT-FT) 45841 35692  
DISPERSION 5 5  
DSI 5 3 5  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-170800-  
LUQUILLO MOUNTAIN RANGE-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 70 30 30  
TEMP (24H TREND) 80 (+3) 62 (-3) 80  
RH % (24H TREND) 62 (+1) 98 (+1) 62  
20FTWND-VAL/AM(MPH) E 6 SE 6  
20FTWND-RDG/PM(MPH) E 8 SE 5 SE 8  
MIXING HGT(FT-AGL/MSL)4019 4276  
TRANSPORT WND (MPH) E 10 SE 8  
VENT RATE (KT-FT) 36924 32392  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ023-170800-  
CENTRAL MOUNTAIN RANGE-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 50 10 40  
TEMP (24H TREND) 82 (+3) 60 (-1) 82  
RH % (24H TREND) 53 (+6) 100 (+4) 51  
20FTWND-VAL/AM(MPH) SE 5 SE 5  
20FTWND-RDG/PM(MPH) E 5 LGT/VAR LGT/VAR  
MIXING HGT(FT-AGL/MSL)6916 7156  
TRANSPORT WND (MPH) E 6 SE 2  
VENT RATE (KT-FT) 35542 23698  
DISPERSION 5 5  
DSI 5 2 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-170800-  
CAYEY MOUNTAIN RANGE-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 20  
TEMP (24H TREND) 81 (+2) 63 (-2) 81  
RH % (24H TREND) 58 (+5) 99 (+2) 56  
20FTWND-VAL/AM(MPH) E 5 SE 5  
20FTWND-RDG/PM(MPH) E 8 LGT/VAR SE 8  
MIXING HGT(FT-AGL/MSL)4803 4957  
TRANSPORT WND (MPH) E 10 SE 8  
VENT RATE (KT-FT) 44269 36114  
DISPERSION 5 5  
DSI 5 2 5  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-170800-  
VIEQUES-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 30 40  
TEMP (24H TREND) 82 (-1) 71 (-1) 82  
RH % (24H TREND) 63 (+6) 87 (-1) 60  
20FTWND-VAL/AM(MPH) E 9 SE 9  
20FTWND-RDG/PM(MPH) E 9 E 10 SE 8  
MIXING HGT(FT-AGL/MSL)3519 3692  
TRANSPORT WND (MPH) E 12 SE 12  
VENT RATE (KT-FT) 37972 37389  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ026-170800-  
CULEBRA-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 40  
TEMP (24H TREND) 82 (-1) 71 (-1) 82  
RH % (24H TREND) 64 (+6) 89 (+2) 61  
20FTWND-VAL/AM(MPH) E 10 SE 11  
20FTWND-RDG/PM(MPH) E 10 E 12 SE 10  
MIXING HGT(FT-AGL/MSL)3598 3308  
TRANSPORT WND (MPH) E 12 SE 12  
VENT RATE (KT-FT) 35914 36267  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ027-170800-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 10 10  
TEMP (24H TREND) 86 (+2) 64 (-1) 86  
RH % (24H TREND) 47 (-2) 100 (+7) 43  
20FTWND-VAL/AM(MPH) E 8 E 7  
20FTWND-RDG/PM(MPH) SE 9 NE 6 SE 8  
MIXING HGT(FT-AGL/MSL)6469 6977  
TRANSPORT WND (MPH) E 8 SE 5  
VENT RATE (KT-FT) 48263 32776  
DISPERSION 5 5  
DSI 5 4 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-170800-  
SAINT THOMAS AND SAINT JOHN-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 40  
TEMP (24H TREND) 84 (+1) 68 (-3) 84  
RH % (24H TREND) 59 (+2) 92 (0) 57  
20FTWND-VAL/AM(MPH) E 10 SE 11  
20FTWND-RDG/PM(MPH) SE 10 E 11 SE 10  
MIXING HGT(FT-AGL/MSL)3443 3331  
TRANSPORT WND (MPH) E 13 SE 13  
VENT RATE (KT-FT) 37605 39972  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 2 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ002-170800-  
ST CROIX-  
348 AM AST WED JAN 16 2019  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 40  
TEMP (24H TREND) 83 (-1) 68 (-1) 83  
RH % (24H TREND) 59 (+2) 97 (0) 59  
20FTWND-VAL/AM(MPH) E 10 SE 10  
20FTWND-RDG/PM(MPH) E 10 E 9 SE 9  
MIXING HGT(FT-AGL/MSL)3495 3537  
TRANSPORT WND (MPH) SE 10 SE 17  
VENT RATE (KT-FT) 34950 53055  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 2 4 3  
 
REMARKS...NONE.  
 

 
 

 
 
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